The purpose of this circuit, which we found in the November 1986 Radio Electronics issue, is to determine the voltage across a zener diode. Several test currents can be selected.
The trigger shown in the figure, built around a 4093 can generate pulses that reach 1 hour with a...
This circuit takes advantage of the thermal noise of the junction of a common transistor,...
This signal follower was found in a 1976 publication. The FET can be BF245 or MPF102 and any...